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A rim type flywheel has to store the greatest amount of energy of 2.5 kJ at the mean engine speed of 300 rpm. The fluctuation of speed is not allowed to exceed 1.5% of the mean and the mass of the flywheel is 500 kg. Assuming the flywheel to be of cast iron and having its internal diameter 0.9 of its external diameter, find the diameters and the thickness of the rim. Take the density of cast iron as 7200 kg m-3.
Two microscope slides are stuck together and touching on one side where n=1.2 and wedged open on the other where n=1.5. These slides sit in air. How many fringes are there for the same slide configuration when it sits in water rather than air
Children sled down a 45m -long hill inclined at 26?. At the bottom, the slope levels out. how far do the children slide on the level ground?
A buoyant object is submerged in water. The buoyant force is measured at 5 lb-ft/sec2. When weighed in the open air, the ball weighs 3 lb. (Remember that open air weight is equal to mass times gravity.) What is the density of the ball?
Question Part Points Submissions Used It is possible to shoot an arrow at a speed as high as 120 m/s. How long would the arrow be in the air
A projectile is launched vertically from the surface of the earth with an initial speed v0 = 6.02 km/s. What is the magnitude of its acceleration (m/s2) 1920 km above the surface of the earth
Air that occupies 0.19 cubic meters at 1.03e+05 Pa gauge pressure is expanded isothermally to atmospheric pressure, Compute the work done by the air
A dielectric-filled parallel-plate capacitor has plate area A = 10.0cm2 , plate separation d = 5.00mmand dielectric constant k = 5.00. Find the energy U1 of the dielectric-filled capacitor
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 2.30 10-6 W/m2 at a distance of 110 m from the explosion. Find the distance from the source at which the int..
Four charges are placed in a three-dimensional space. The charges have magnitudes +1nC, 4nC, +1nC, and 9nC. what will be the electric flux through that surface
A burning firecracker is tossed into the air at an angle of 60 degrees up from the horizon. If it leaves the hand of the hurler at the speed of 30 m/s, how long should the fuse be set to burn if the explosion is to occur 20 m away. Ignore friction..
A charge q is distributed uniformly around a thin ring ofradius r. What is the direction of this magnetic moment if the chargeis positive
an unpolarized light beam traveling along the x-axis is sent into a system of three polarizers. the polarization axis
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